Printing-press.



G. P. FENNER.

PRINTING PRESS.

APPLICATION FILED AuGJQ, 1914.

1,150,107. Patented Aug. 17,1915.

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G/eoryf 776727162" G. P. FENNER.

PRINTING PRESS. APPLICATION FILED AUG.I9. 191.4.

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coLuMrglA PLANOGRAPH c9..wASH|NaTON, D. C.

G. P. FENNER.

PRINTING PRESS.

APPLICATION FILED Auens. |914.

1 1 50, 1 07 v Patented Aug. 17, 1915.

4 SHEETS-SHEET 3.

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Wnwo: wwe Moz v COLUMBIA PLANMRAPH co.. WASMINMON. D. c.

G. P. FENNER.

PRINTING- PRESS.

APPLICATION FILED AUG.I9, I9I4. I 1,150,107. 111161116111111@ 17,1915.

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GEORGE r. rnivivnn, oirivnvv-` Loivooiv, CONNECTICUT. y-

v PRINTING-PRESS."

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, specification of Leiters Patent. Paten-ted Ang. 17, 1915.

Application led August 19, 19714. Serial No. 857,495.

To all whom t may concern:

Be it known that I, GEORGE P. FENNER, a citizen of the United States, residing at New London, county of New London, and State of Connecticut, have invented new and useful Improvements in Printing-Presses, of which the following is a specification.

1 This invention relates to a printing press in which the rotary impression cylinder can be elevated or lowered at any timeby the c operator of the-press.

i5 Y pression, wliilef at the return stroke of the One important advantage of this arrangement is that it is possible for the operator tol wait until the last instant ,before the cylin-v der strikes the forni, and even then tripping Vthe cylinder quickly enough to avoid printing on the Lpacking of the Cylinder which is the primary reason for throwing oflthe cyl,- iiider. In other words if there is no sheet on the cylinder to be yprinted the type puts ink on to the packingof the cylinder, hence they following number of sheets will be printed on the reverse side, thus being spoiled.

n Another object of the invention is, that none of the tripping devices are in action. eX- cept when thetrip is actually being used, that is: when the cylinder is tripped all the Ymechanism employedin tripping the vcylinder goes out of action. Consequently when the cylinder is lowered or thrown :back againthe same result occurs. In a press of this kind the mechanism, for tripping is manually controlled,` there being no cams actuated by the means employedffor rotating the cylinder, or moving parts of any sort to complicate the mechanismandV wearout. f

The elevating and lowering devices are preferably' applied to a singlefrevolution printing press in which the impression cylinder revolves once for each impression,

while the bed moves forward and back. The cylinder has a raised and depressed periphery so that when the bed moves forward the raised surface vof thecylinder engages `the form carried bythe bed to produce the imbed the rdepressed surface ofthe cylinder will be. out of Contact with the bed. In a flat bed press as shown in the drawing the cylinderv musthave two diameters, the amount of surface which can be used for the impression being approximately about one quarter of the circumference of the cylinder. A

'.Thenovel features of the invention are moreL fully described in the following specilication and claims and illustratedin the accompanying drawings in which:

Figure l is ay plan view of .av printing press embodying this invention. Fig. 2 is a side elevation of the same showingthe ,cyl-

inder lowered. Fig. 3 is a front elevation of.

the same. Fig. 4e isa side elevation of a modification showing the cylinder elevated and tripped. K Y Y In these drawings the letter a designates a pair of side frames of suitable construction for mounting an impression cylinder and a .form carrying bed c. `The impression cylinder can be revolved and the Vbed given reciprocating movement in a rectilinear path driving the bedr and'cylinderv is well known and' therefore is not shown in the drawing. The cylinder isrprovided with a raised surin any well known way. The mechanism! for face al covering aboutone quarter of the circumference of the cylinder for' contact with Y the form of the bed, and a depressed surface c covering the remainder of the cylinderto allowy the .return stroke of the bed without touching the cylinder.' Mounted on the cylinder are a series of grippers 'f which are actuated the usualcam f/L l The impression Cylinder is provided with a shaft iljournaled in slides orboXes i located at each side of the press land adapted to move vertically in the side frames. A

coiled spring y' coacts with the lower portionV ofeachv slide, and lthese springs supporty and at the same ytime have a tendency to push the 'cylindervupwardl' Over each slide is connected a toggle leverc-'eachtoggle having an arm m fixed to the upper linkof a toggle. A rocker shaftn extends across the press between the frames, 'and it has fulcrumed to it levers olocated on each side of the press. At

l each 'end of alever 0 is pivoted a ulink p for Vconnection withV the ends of the said arms.

One of thel levers 0 at one side of the press is providedwith a connecting rodV or pitman' Q preferablypivoted to the link end ofthe leverand having its lower end connected to a crank rinounted on a shaft s. This shaft carries a pinion which is adaptedto rotate by the actuation of the crank. y l Y The pinion engages a gear u mounted on y a'shaft @,as indicated in Fig. 2. The gear u is three vtimesthe ratio of the pinion.v Pivoted to, theface of the gear is a pawl w which is held in positionby a spring secured to the gear. ratchet y fastened to one endof a lever z.

Il() The pawl'engages a throwing the cylinder, a pinion connected to the throwing` means, means for limiting the movement of the pinion, and a gear of larger diameter in engagement with the pinion controlled bythe operator to trip the cylinder. f

4l. In a printing press the combination with an impression cylinder, of toggle lea crank pivoted to the pitman, and manu-- ally controlled tripping devices including gears of different radii connected to the crank for throwing the cylinder.

6. In a single revolution printing press the combination with a bed, of a rotary kimpression cylinder in vwhich the impression surface is less than one halfthe circumference of the cylinder, toggle levers mounted above the aXis of the cylinder, means for vyieldingly supporting the cylinder, a rockv lever linked to the toggle lever, a pitman coacting with the rock lever, a crank pivoted to the pitman, and manually controlled tripping devices connected to the crank for throwing the cylinder, said tripping devices including gears of different diameter for imparting movement to the crank.

y 7. In a printing press Athe combination with an impression cylinder, of manually controlled means for elevating and lowering the cylinder, a crank coactingwith the elevating and lowering means, and tripping devices including gears of different Vradii for imparting movement to the crank.

8. In a printing press the combination with an impression cylinder, of manually controlled means for elevating and lowering the cylinder at any time, gears of different radii connected to the elevating and lowering devices, a treadle for actuating the gears, and means for preventing excessive' movement of the gears.

9. In a printing pressk `the combination with an impression cylinder, of manually controlled means for elevating and lower- A ing the cylinder at any time, a crank and a y pinion coacting with the elevating and lowering means, a treadle connected to the crank for actuating the pinion.

l0. In a printing press the combination with an impression cylinder, of means including slides for throwing the cylinder, a cam mounted on the slides, and a feed board actuated by the cam..

ll. In a printing press the combination y with an impression cylinder, of means including slides for throwing the cylinder, a cam mounted on the slides, and-a feed board pivotally connected to the cam.

12. In a printing press the combination Y with an impression cylinder, of means ini cluding slides for throwing the cylinder, a

cam mounted on the slides, rails pivoted to the cam, and a feed board supported 'on the rails.

13. In a printing press the combination with an impression cylinder, of means including slides forthrowing the cylinder, a

cam mounted on the slides, a feed board pivotally connected to the cam, and a feed 4guide swingingly coacting with the feed board.

In testimony whereofI have hereunto set my hand in the presence of two subscribing witnesses. f

GEORGE P. EE'NNER.-

Witnesses:

GEO. H. SIs'rARE, EVA L. HUDSON.

Copies of ,thispatent may be'obtained for ve cents each, by addressingl the Commissioner of Patents,

Washington, D. C. i 

